

.box {
    width: 1168px;
    height: 400px;
    // background: red;
    margin: 0px auto;
}

.item {
    width: 190px;
    height: 400px;
    float: left;
}

.item:nth-child(1) {
    background: url("../img/10.jpg") no-repeat;
    background-size: 100% 100%;
    /*background-size: 100% 100%; 背景图尺寸 */
}

.item:nth-child(2) {
    background: url("../img/11.jpg")  no-repeat 100% 100%;
    margin-left: 10px;
    background-size: 100% 100%;
}

.item:nth-child(3) {
    background: url("../img/12.jpg")  no-repeat 100% 100%;
    margin-left: 10px;
    background-size: 100% 100%;
}



.big {
    width: 692px;
}

.big img {
    display: none;
    height: 519px;
}
